Process for dyeing animal or mixed fibers



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IFPA'UL ONNEBQTZyOF IBERLIN-WILI YIERSDORF, AND ALFRED PETERS, OF BERLIN, emmm, ASSIGNORS TO ACTIEN 'GESELLSCHAFT- F63 ANILIN FABRIKATION,

' or BERLIN, GERMANY.

rnocnss non nvnme anmmr. on FIBERS.

1W0 Drawing.

i v To all whom it mag 'concem:

Be it known that we, PAUL.ONNERrz and Ammo Pn'rnns, citizens ofthe German Republic, residing at Berlin-Wilmersdorf, Germany, and Berlin, Germany, our P. 0. address being Diisseldorferstrasse 72, Ber- 'lin -Wilmersdorf, Germany, and Groben- Ibath. But-it is 'difiicult to dye always in the Ufer, 4', Berlin S. O. 33, Germany, have invented certaln new and useful Improvements in a Process forDyein' Animal or Mixed v Fibers, ofwhich the fol owing is a specification.

Animal fiber usually dyed inv an acid bath and in orderto preserve the-textile fiber and its valuable properties it is not advisable to apply a neutral, much less an alkaline presence of an acid, because many dyestufi's of difierent'classes settle cumstances. .c v

Nowit was found that by the addition of sulfite cellulose waste liquor to the dye bath the tendency of the dye-stuffs to settle out is diminished or fully avoided. If such an addition is. made wool, half-wool, silk, etc,

may be dyed in an acid bath with dyestufis --otherwise diflicultl applicable in the presvation of the fiber, for-instance the elasticity, 30.

1. The bath is prepared with 3% alkali blue 4B, 10% sodium-suliate cryst., 5% sull fite cellulose waste liquorof 28 B.,' 2%

cdnc. sulfuric acid tron: w'eight of wool.

out under these cir- I .fibers in an acid bath wit illustrate our invention the following examples aregiven Application aiea November 5,1921.- Serial a... 513,180.

The wool being entered at about 80 C. it is I raised to the boil and boiled for 1; hour.

2. The bath is'prepared'with 2% Zambesi' black D, 10% sodium sulfate cryst., 5% sulfite cellulose ,waste liquor of 28 Be, 3% acetic acid 30% from the weight of wool.

The wool being entered at about C. it is slowly raised to the boil and boiled for 1 hour.

3. The bath is prepared with 1% potassium chromate, 2% ammonium sulfate, 3% metachrom brown B, 5% sulfite cellulose waste liquor 28 B., 2% acetic acid 30% from: the weight of wool. The wool being entered at about 50 0., during hour it is raised to the boil and'boiled for 11} hours.

Having described our invention, what we claim is:

' 1. The process for dyein animal ormixed settling out in the presence of an acid, characterized by the addition to the dye bath of sulfite. cellulose waste liquor.

dyestuffs easily 2. The process for dyein animal or mixed fibers in an acid bath wit dyestufi's easily settling out in the presence of an acid, characterized/by the addition of active substances contained 1n sulfite cellulose waste liquor.

. 3; The process for dyeing animal or mixed fibers in an acid bath with dyestuffs easily settling out in the presence of an acid, char- ..acterized by the addition of sodium lignin sulfonateiand sugars.

'4. The process tor a fibers in anv acid bath withdyestufi's easily settling out in the presence of an acid, characterized'by the addition of sugars.

In testimony whereof we afiix our signa DR. PAUL ONNERTZ.

tures in presence of two witnesses.

ALFRED PETERS.

Witnesses KARL BARTH, Amman SCHNEIDER.

dyeing animal or mixed J 

